Ion, Trinity and Univision have weighed in at the FCC with supplemental evidence for what they argue is the need to roll back the FCC’s 39% cap on a TV station group’s national audience reach, and preferably all the way rather than raising it once again.

21st Century Fox is in talks to operate television stations across the U.S. with Ion Media Networks, potentially paving the way for Fox to dump Sinclair Broadcast Group as an affiliate partner, a person familiar with the situation said. Closely held Ion would contribute its more than 60 independent stations to the joint venture, while Fox would throw in its 28 stations, which include top markets such as New York and Los Angeles. As part of the deal, Fox would consider switching its affiliation to Ion from Sinclair for 26 stations that are up for renewal this year, said the person, who asked not to be identified.